I am not clear on how this works. My default maps are North America. I bought a Garmin SDcard for Europe. I placed it in the back of the unit. I turned it on and I can see Europe streets. I have some routes and I can see them.
Do both maps coexist? Does the GPS automatically bring up the map regardless of internal or SD storage? Will the card replace the internal storage maps? If I am using the maps on the SD card, do I need to worry about performance while I am riding? Do I need to make the European maps the default map?
